package com.wiser.voiceanim.aduio;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.media.MediaRecorder;
import android.os.Environment;
import android.os.Handler;
import android.util.Log;

/**
 * 录音管理器
 *
 * @author wxy
 */
public class AudioManager implements MediaRecorder.OnInfoListener {

	// 文件路径
	private String filePath;

	// 文件夹路径
	private String FolderPath;

	private long						startTime;

	private long						endTime;

	private int							BASE				= 1;

	private int							SPACE				= 1;			// 间隔取样时间

	private MediaRecorder mMediaRecorder;

	private final String TAG					= "wxy";

	public static final int				MAX_LENGTH			= 1000 * 60;	// 最大录音时长1000*60;

	public static boolean				isMaxRecordLength	= false;		// 是否到达录制时间

	private OnAudioStatusUpdateListener	audioStatusUpdateListener;

	/**
	 * 文件存储默认sdcard/record
	 */
	public AudioManager() {
		// 默认保存路径为/sdcard/record/下
		this(Environment.getExternalStorageDirectory() + "/record/");
	}

	public AudioManager(String filePath) {
		File path = new File(filePath);
		if (!path.exists()) path.mkdirs();

		this.FolderPath = filePath;
	}

	// 使用系统当前日期加以调整作为录音的名称
	public static String getAudioFileName() {
		Date date = new Date(System.currentTimeMillis());
		SimpleDateFormat dateFormat = new SimpleDateFormat("'VOICE'_yyyyMMdd_HHmmss");
		return dateFormat.format(date) + ".mp3";
	}

	/**
	 * 开始录音 使用amr格式 录音文件
	 *
	 * @return
	 */
	public void startRecord() {
		// 开始录音
		/* ①Initial：实例化MediaRecorder对象 */
		if (mMediaRecorder == null) mMediaRecorder = new MediaRecorder();
		try {
			mMediaRecorder.setOnInfoListener(this);
			/* ②setAudioSource/setVedioSource */
			mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);// 设置麦克风
			/* ②设置音频文件的编码：AAC/AMR_NB/AMR_MB/Default 声音的（波形）的采样 */
			mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
			/*
			 * ②设置输出文件的格式：THREE_GPP/MPEG-4/RAW_AMR/Default THREE_GPP(3gp格式
			 * ，H263视频/ARM音频编码)、MPEG-4、RAW_AMR(只支持音频且音频编码要求为AMR_NB)
			 */
			mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

			filePath = FolderPath + getAudioFileName();
			/* ③准备 */
			mMediaRecorder.setOutputFile(filePath);
			mMediaRecorder.setMaxDuration(MAX_LENGTH);
			mMediaRecorder.prepare();
			/* ④开始 */
			mMediaRecorder.start();
			// AudioRecord audioRecord.
			/* 获取开始时间* */
			startTime = System.currentTimeMillis();
			updateMicStatus();
			Log.e("fan", "startTime" + startTime);
		} catch (Exception e) {
			if (audioStatusUpdateListener != null) audioStatusUpdateListener.onError();
		}
	}

	/**
	 * 停止录音
	 */
	public long stopRecord() {
		if (mMediaRecorder == null) return 0L;
		endTime = System.currentTimeMillis();

		// 有一些网友反应在5.0以上在调用stop的时候会报错，翻阅了一下谷歌文档发现上面确实写的有可能会报错的情况，捕获异常清理一下就行了，感谢大家反馈！
		try {
			mMediaRecorder.stop();
			mMediaRecorder.reset();
			mMediaRecorder.release();
			mMediaRecorder = null;

			audioStatusUpdateListener.onStop((endTime - startTime) / 1000, filePath);
			filePath = "";

		} catch (Exception e) {
			mMediaRecorder.reset();
			mMediaRecorder.release();
			mMediaRecorder = null;

			if (filePath != null) {
				File file = new File(filePath);
				if (file.exists()) file.delete();
			}

			audioStatusUpdateListener.onError();
			filePath = "";
		}
		return endTime - startTime;
	}

	/**
	 * 取消录音
	 */
	public void cancelRecord() {

		try {
			mMediaRecorder.stop();
			mMediaRecorder.reset();
			mMediaRecorder.release();
			mMediaRecorder = null;
		} catch (RuntimeException e) {
			mMediaRecorder.reset();
			mMediaRecorder.release();
			mMediaRecorder = null;
		}
		File file = new File(filePath);
		if (file.exists()) file.delete();

		filePath = "";

	}

	private final Handler mHandler				= new Handler();

	private Runnable mUpdateMicStatusTimer	= new Runnable() {

														public void run() {
															updateMicStatus();
														}
													};

	public void setOnAudioStatusUpdateListener(OnAudioStatusUpdateListener audioStatusUpdateListener) {
		this.audioStatusUpdateListener = audioStatusUpdateListener;
	}

	/**
	 * 更新麦克状态
	 */
	private void updateMicStatus() {

		if (mMediaRecorder != null) {
			double ratio = (double) mMediaRecorder.getMaxAmplitude() / BASE;
			double db = 0;// 分贝
			if (ratio > 1) {
				db = 20 * Math.log10(ratio);
				if (null != audioStatusUpdateListener) {
					audioStatusUpdateListener.onUpdate(db, System.currentTimeMillis() - startTime);
				}
			}
			mHandler.postDelayed(mUpdateMicStatusTimer, SPACE);
		}
	}

	@Override
    public void onInfo(MediaRecorder mr, int what, int extra) {
		if (what == MediaRecorder.MEDIA_RECORDER_INFO_MAX_DURATION_REACHED) {
			isMaxRecordLength = true;
			stopRecord();
		}
	}

	public interface OnAudioStatusUpdateListener {

		/**
		 * 录音中...
		 *
		 * @param db
		 *            当前声音分贝
		 * @param time
		 *            录音时长
		 */
		void onUpdate(double db, long time);

		/**
		 * 停止录音
		 *
		 * @param time
		 *            录制时间
		 * @param filePath
		 *            保存路径
		 */
		void onStop(long time, String filePath);

		void onError();
	}

}